In many cases you are testing cold because it won't start, so the tests remain consistent.I don’t know squat about this but I have wondered why you wouldn’t want a warm or hot saw to test compression to better reflect running condition like the Homey info above. If your doing a cold saw would you want to set the choke for a few pulls to get some oil on the rings, then go to no choke with open throttle to get compression check? Isn’t the hot saw more realistic?
That's a really good point, never thought about it. It also means if you're comparing across saws, the one with an empty fuel tank isn't getting a "fair" comparison to your daily driver saw that still has fuel.What has not been mentioned is that every time the rope is pulled even with the gage hooked up is that mix is being drawn into the cylinder, thereby raising the compression a bit, unless the compression is so low that it will not draw the mix in the first place. Think about it. Ken